To quickly and accurately detect information such as the number of viewers and an audience rating or the like in each page configuring a data broadcast program.

An information server 12 of a broadcast device 1 converts control information used to control a receiver for return of information as to which page a recipient selects into a prescribed format, which is fed to a multiplexer 13, and the information is broadcast while being included in a broadcast signal of a data broadcast program. The receiver receiving and selecting the data broadcast program returns information as to which page the recipient selects to an interaction manager 16 of the broadcast device 1 through an interactive channel 3. The interaction manager 16 collects information sets as to returned pages to obtain the number of viewers and the audience rating of each page of the data broadcast program.